//客户端代码

 <form id="form1" runat="server">
        <asp:ScriptManager runat="server" ID="ScriptManager1" ScriptMode="Debug">
            <Services>
                <asp:ServiceReference Path="Services/ReturnXmlService.asmx" InlineScript="true" />
            </Services>
        </asp:ScriptManager>
        
        <input type="button" value="GetXmlDocument" onclick="ReturnXmlService.GetXmlDocument(onSucceeded);" /><br /><br />
        <input type="button" value="GetXmlElement" onclick="ReturnXmlService.GetXmlElement(onSucceeded);" /><br /><br />
        <input type="button" value="GetEmployee" onclick="ReturnXmlService.GetEmployee(onSucceeded);" /><br /><br />
        <input type="button" value="GetXmlString" onclick="ReturnXmlService.GetXmlString(onSucceeded);" /><br /><br />
        <input type="button" value="GetSerializedString" onclick="ReturnXmlService.GetSerializedString(onSucceeded);" />
        
        <script language="javascript" type="text/javascript">
            function onSucceeded(result)
            {
                alert(result.xml);
            }
        </script>
    </form>

//服务端代码

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Xml)]
    public XmlNode GetXmlDocument()
    {
        XmlDocument doc = new XmlDocument();
        doc.LoadXml("<Employee><Name>Jeffrey Zhao</Name><Salary>1000</Salary></Employee>");return doc;
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat